Z90348 Zilog., Z90348 Datasheet

Z90348

Manufacturer Part Number

Z90348

Description

DIGITAL TELEVISION CONTROLLER IN-CIRCUIT EMULATOR (ICE) DEVICE

Manufacturer

Zilog.

Datasheet

1.Z90348.pdf (8 pages)

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Zilog

FEATURES

GENERAL DESCRIPTION

The Z90349 and Z90348 are ROMless versions of the

Z89300 family of Zilog's Digital Television Controllers

designed for use in emulators and development boards to

provide complete audio and video control of television

receivers, video recorders, and advanced on-screen

display facilities.

The powerful Z89C00 RISC processor core allows users to

control on-board peripheral functions and registers using

the standard processor instruction set.

In closed caption mode, text can be decoded directly from

the composite video signal and displayed on the screen

with assistance from the processor's digital signal

processing capabilities. The character representation in

this mode allows for a simple attribute control through the

insertion of control characters.

The character control mode provides access to the full set

of attribute controls. The modification of attributes is allowed

on a character-by-character basis. The insertion of control

characters permits direction of other character attributes.

Display attributes, including underlining, italics, blinking,

eight foreground/background colors, character position

offset delay, and background transparency, are made

possible through a fully customized 512 character set.

CP97TEL2600

Part

Number

Z90349

Z90348

144-Pin Grid Array (PGA) Package (Z90349)

100-Pin Quad Flat Pack (QFP) Package (Z90348)

4.5- to 5.5-Volt Operating Range

Z89C00 RISC Processor Core

0 C to +70 C Temperature Range

ROM

(Word)

RAM

(Word)

Speed

(MHz)

P R E L I M I N A R Y

Z90349/348

DIGITAL TELEVISION CONTROLLER

IN-CIRCUIT EMULATOR (ICE) DEVICE

Serial interfacing with the television tuner is provided

through the tuner serial port. Digital channel tuning

adjustments may be accessed through the industry-

standard I

Additional hardware provides the capability to display two

to three times normal size characters. The smoothing logic

contained in the on-screen display circuit improves the

appearance of larger fonts. Special circuitry can be

activated to improve the visibility of text by adding a right-

sided shadow effect to the characters.

Receiver functions such as color and volume can be

directly controlled by six 8-bit pulse width modulated

ports.

Notes:

All Signals with a preceding front slash, "/", are active Low, e.g.:

B//W (WORD is active Low); /B/W (BYTE is active Low, only).

Power connections follow conventional descriptions below:

RELIMINARY

USTOMER

Connection

Direct Closed Caption Decoding

TV Tuner Serial Interface

Customized Character Set

Character Control Mode

Directly Controlled Receiver Functions

V-Chip Decode

Ground

Power

C port.

ROCUREMENT

Circuit

GND

PECIFICATION

Device

Z90349/Z90348

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